Qodem
Encyclopedia
Qodem is a text-based
free software
clone of the popular MS-DOS
program Qmodem
, updated for use on modern Unix-like
operating systems. Its main features include Unicode
support, multiple terminal emulations (Avatar, ANSI.SYS
, VT100
, XTerm
, and others), file transfer protocols, keyboard macros, external scripts, and a dialing directory.
Qodem is commonly used to access Bulletin Board Systems
and remote serial consoles. It can conveniently transfer files over interactive ssh
and telnet
sessions with serial protocols such as Zmodem
and Kermit
.
Text-based
Usually used in reference to a computer application, a text-based application is one whose primary input and output are based on text rather than graphics or sound. This does not mean that text-based applications do not have graphics or sound, just that the graphics or sound are secondary to the...
free software
Free software
Free software, software libre or libre software is software that can be used, studied, and modified without restriction, and which can be copied and redistributed in modified or unmodified form either without restriction, or with restrictions that only ensure that further recipients can also do...
clone of the popular MS-DOS
MS-DOS
MS-DOS is an operating system for x86-based personal computers. It was the most commonly used member of the DOS family of operating systems, and was the main operating system for IBM PC compatible personal computers during the 1980s to the mid 1990s, until it was gradually superseded by operating...
program Qmodem
Qmodem
Qmodem was an MS-DOS shareware telecommunications program and terminal emulator. Qmodem was widely used to access bulletin boards in the 1980s and was well respected in the Bulletin Board System community. Qmodem was also known as Qmodem SST and Qmodem Pro....
, updated for use on modern Unix-like
Unix-like
A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification....
operating systems. Its main features include Unicode
Unicode
Unicode is a computing industry standard for the consistent encoding, representation and handling of text expressed in most of the world's writing systems...
support, multiple terminal emulations (Avatar, ANSI.SYS
ANSI.SYS
ANSI.SYS is a device driver in the DOS operating system that provides extra console functions through ANSI escape sequences. It is partially based upon a subset of the text terminal control standard proposed by the ANSI X3L2 Technical Committee on Codes and Character Sets .-Usage:To use ANSI.SYS...
, VT100
VT100
The VT100 is a video terminal that was made by Digital Equipment Corporation . Its detailed attributes became the de facto standard for terminal emulators.-History:...
, XTerm
Xterm
In computing, xterm is the standard terminal emulator for the X Window System. A user can have many different invocations of xterm running at once on the same display, each of which provides independent input/output for the process running in it .xterm originated prior to the X Window System...
, and others), file transfer protocols, keyboard macros, external scripts, and a dialing directory.
Qodem is commonly used to access Bulletin Board Systems
Bulletin board system
A Bulletin Board System, or BBS, is a computer system running software that allows users to connect and log in to the system using a terminal program. Once logged in, a user can perform functions such as uploading and downloading software and data, reading news and bulletins, and exchanging...
and remote serial consoles. It can conveniently transfer files over interactive ssh
Secure Shell
Secure Shell is a network protocol for secure data communication, remote shell services or command execution and other secure network services between two networked computers that it connects via a secure channel over an insecure network: a server and a client...
and telnet
TELNET
Telnet is a network protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communications facility using a virtual terminal connection...
sessions with serial protocols such as Zmodem
ZMODEM
ZMODEM is a file transfer protocol developed by Chuck Forsberg in 1986, in a project funded by Telenet in order to improve file transfers on their X.25 network...
and Kermit
Kermit (protocol)
Kermit is a computer file transfer/management protocol and a set of communications software tools primarily used in the early years of personal computing in the 1980s; it provides a consistent approach to file transfer, terminal emulation, script programming, and character set conversion across...
.